Mini Cooper S JCW R55 R56 Ignition Wiring Harness Injection Valve N14 7620641

Mini Cooper S JCW R55 R56 Ignition Wiring Harness Injection Valve is an original engine electrical system component, belonging to the Wires, harnesses and connectors category. Designed specifically for the N14 engine in Cooper S and John Cooper Works versions, it ensures stable power supply and control for the fuel injectors, which translates into proper operation of the injection system and reliable ignition of the fuel mixture.

Specifications and technical data

• SKU: 7620641
• Mark: Mini (Genuine OE)
• Condition: Used
• OEM Part Number: 7646453
• Substitutable numbers: 12517646453, 12517601187, 12517620641, 7601187, 7620641, AS
• Category: Wiring Harnesses, Cables & Connectors

Purpose and function in the engine system

The presented wiring harness is a component dedicated to the N14 engine in Mini Cooper S and JCW models of the R55 and R56 generations. It is responsible for the electrical connection between the engine control unit and the injectors, ensuring proper control signals and power supply. A properly functioning harness reduces the risk of ignition misfires, misfiring under load, and starting problems on both hot and cold engines.

Thanks to the factory OEM design, the harness maintains the correct wire routing, appropriate segment lengths, and matched connectors, which facilitates installation and minimizes the risk of mechanical stress or insulation damage during operation.

Construction and technical features

The ignition wiring harness for injectors consists of wires with a selected diameter and insulation resistant to temperature and vibrations occurring in the engine bay. The connectors used are matched to the factory injector sockets and Mini installation, which allows for installation without modifications, soldering, or the use of adapters.

The layout of the wires and mounting points is consistent with the manufacturer's original design, which facilitates routing the harness along the cylinder head and intake manifold, and also limits the risk of contact with hot exhaust system components. Such a design promotes stable operation of the injection system in the long term.

Condition, fitment and installation

The item comes from disassembly and is offered as a used ignition wiring harness for injectors. This is a good solution for users who want to restore the efficiency of the injection system while maintaining the factory specification of the part, without the need to use replacements with uncertain parameters.

Thanks to the preservation of original connectors and wire geometry, installation comes down to disconnecting the old harness and connecting the new one at the same points. In practice, this means shorter service time, lower risk of installation errors, and compliance with the factory Mini service documentation.

Benefits of using an original wiring harness

• Factory fitment – compatibility with the electrical system of the Mini Cooper S JCW R55/R56 with the N14 engine.
• Stable injection system operation – proper injector control reduces engine performance issues.
• No modifications required – original connectors and wire lengths enable plug-and-play installation.
• Consistency with other system components – the harness works with the factory engine control unit and accessories.

If you are planning a comprehensive repair or upgrade of the engine area in your Mini and need other components from the same group, such as power cables, sensor harnesses, or engine installation connectors, check the available parts in the Mini wires, harnesses and connectors category.

For drivers interested in a wider use of used components in the automotive industry, including in the context of tuning and repairs, it is worth reading an article describing a practical approach to second-hand parts: Audi on second-hand parts – tuning and repairs without losing quality.